Originally posted by WD40
What do you use to cover the holes in the back, when the rack isn't on?
I'd think you'd get some water in the interior if you didn't plug them.
i'd pick up a couple of rubber O-rings that fit around the bolts, fit them around the bolts, and put the bolts back in
and an extra bonus -- you know exactly where the bolts are when you want to put the rack back on!